US9100640B2 - Method and system for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information - Google Patents
Method and system for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/20—Image signal generators
- H04N13/204—Image signal generators using stereoscopic image cameras
- H04N13/25—Image signal generators using stereoscopic image cameras using two or more image sensors with different characteristics other than in their location or field of view, e.g. having different resolutions or colour pickup characteristics; using image signals from one sensor to control the characteristics of another sensor
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- H04N13/025—
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- H04N13/0018—
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- H04N13/026—
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- H04N13/0271—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/122—Improving the 3D impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/20—Image signal generators
- H04N13/261—Image signal generators with monoscopic-to-stereoscopic image conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/20—Image signal generators
- H04N13/271—Image signal generators wherein the generated image signals comprise depth maps or disparity maps
Definitions
- Certain embodiments of the invention relate to video processing. More specifically, certain embodiments of the invention relate to a method and system for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information.
- ISP image sensor pipeline
- 3D video supports and demand for video systems that support three-dimensional (3D) video has increased rapidly in recent years. Both literally and physically, 3D video provides a whole new way to watch video, in home and in theaters. However, 3D video systems are still in their infancy in many ways and there is much room for improvement in terms of both cost and performance.
- a system and/or method is provided for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information, substantially as shown in and/or described in connection with at least one of the figures, as set forth more completely in the claims.
- ISP image sensor pipeline
- FIG. 1 is a diagram that illustrates an exemplary monoscopic, or single-view, camera embodying aspects of the present invention, compared with a conventional stereoscopic camera.
- FIG. 2A is a diagram illustrating an exemplary monoscopic camera, which may be utilized in accordance with an embodiment of the invention.
- FIG. 2B is a block diagram illustrating an exemplary image sensor pipeline (ISP), which may be utilized in accordance with an embodiment of the invention.
- ISP image sensor pipeline
- FIG. 3 is a diagram that illustrates exemplary processing of depth information and 2D image information to generate a 3D image, which may be utilized in accordance with an embodiment of the invention.
- FIG. 4 is a diagram that illustrates exemplary selective processing of objects via monoscopic camera based on Z-depth information to enable adaptive color enhancement, which may be utilized in accordance with an embodiment of the invention.
- FIG. 5 is a flow chart that illustrates exemplary steps for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information, in accordance with an embodiment of the invention.
- ISP image sensor pipeline
- a monoscopic video camera may be utilized to detect presence of objects at varying depths, and may adaptively configure color related processing of video information associated with each of these objects based on corresponding depth for each for these objects.
- Color related processing may comprise setting and/or adjusting color relate parameters and/or overall color hue associated with the objects.
- the monoscopic video camera may capture, via at least one image sensor, two-dimensional video, and may capture, via at least one depth sensor, corresponding depth information for the captured two-dimensional video.
- the monoscopic video camera may then determine presence of objects in the captured two-dimensional video, based on the captured corresponding depth information for example.
- color related processing of image related information corresponding to the objects may be configured based on corresponding depth information of the object.
- configuring color related processing may comprise setting and/or adjusting color information associated with the object.
- Setting and/or adjusting color information may be based on, for example, shadow, shade, and/or edge related information associated with the object. At least some of the shadow, shade, and/or edge related information associated with the object may be generated and/or modified based on the captured corresponding depth information based on the captured corresponding depth information.
- Configuration of color related processing of image related information associated with objects may be performed based on preset criteria and/or parameters associated with identified types and/or characteristics of the objects.
- the monoscopic video camera may be operable to synchronize the captured corresponding depth information to the captured two-dimensional video, to enable generating 3D perception for at least some images captured via the monoscopic video camera. Accordingly, the monoscopic video camera may compose three-dimensional video from captured two-dimensional video based on corresponding captured depth information. The monoscopic video camera may then render the composed three-dimensional video, autonomously, utilizing for example an integrated display in the monoscopic video camera, or via another display device, to which the 3D video may be communicated directly from the monoscopic video camera or indirectly via intermediate storage devices.
- FIG. 1 is a diagram that compares a monoscopic camera embodying aspects of the present invention with a conventional stereoscopic camera. Referring to FIG. 1 , there is shown a stereoscopic camera 100 and a monoscopic camera 102 .
- the stereoscopic camera 100 may comprise suitable logic, circuitry, interfaces, and/or code that may enable capturing and/or generating stereoscopic video and/or images.
- the stereoscopic camera 100 may comprise two lenses 101 a and 101 b .
- Each of the lenses 101 a and 101 b may capture images from a different viewpoint and images captured via the two lenses 101 a and 101 b may be combined to generate a 3D image.
- electromagnetic (EM) waves in the visible spectrum may be focused on a first one or more image sensors by the lens 101 a (and associated optics) and EM waves in the visible spectrum may be focused on a second one or more image sensors by the lens (and associated optics) 101 b.
- EM electromagnetic
- the monoscopic camera 102 may comprise suitable logic, circuitry, interfaces, and/or code that may enable capturing and/or generating monoscopic video and/or images.
- the monoscopic camera 102 may capture images via a single viewpoint, corresponding to the lens 101 c for example.
- EM waves in the visible spectrum may be focused on one or more image sensors by the lens 101 c .
- the image sensor(s) may capture brightness and/or color information.
- the captured brightness and/or color information may be represented in any suitable color space such as YCrCb color space or RGB color space.
- the monoscopic camera 102 may be operable to generate 3D video and/or images based on captured 2D video and/or images based on, for example, depth information.
- the monoscopic camera 102 may also capture depth information via the lens 101 c (and associated optics).
- the monoscopic camera 102 may comprise an infrared emitter, an infrared sensor, and associated circuitry operable to determine the distance to objects based on reflected infrared waves. Additional details of the monoscopic camera 102 are described below.
- the monoscopic camera may comprise a processor 124 , a memory 126 , and a sensory subsystem 128 .
- the processor 124 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to manage operation of various components of the camera and perform various computing and processing tasks.
- a single processor 124 is utilized only for illustration but the invention is not so limited.
- various portions of the camera 102 depicted in FIG. 2A below may correspond to the processor 124 depicted in FIG. 1 .
- the memory 106 may comprise, for example, DRAM, SRAM, flash memory, a hard drive or other magnetic storage, or any other suitable memory devices.
- the sensory subsystem 128 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to generate and/or capture sensory related information, such as imaging, color, and/or depth information, and/or to handle at the least some of the processing of sensory information.
- the sensory subsystem 128 may comprise, for example, a plurality of sensors which may be operable to capture and/or generate video information corresponding to images and/or video streams generated via the monoscopic camera 102 , and/or may also comprise additional hardware and/or software that may be utilize in generating and/or performing at least some of processing of the information.
- the sensory subsystem 128 may enable generating 2D video and corresponding depth and/or color information.
- the sensory subsystem 128 may comprise, for example, one or more image sensors, one or more depth sensors, and one or more sensors. In this regard, exemplary sensors that may be integrated into the sensory subsystem 128 are described in more detail below with respect to FIG. 2A .
- the monoscopic camera 102 may be operable to utilize depth information for enhancing color associated with 3D video and/or images generated based on captured 2D video and/or images.
- color-related video processing may be configured and/or adjusted to enhance coloring related information in captured and/or generated 2D video or images.
- color related video processing for specific pixels or regions in captured images may be performed and/or configured selectively and/or adaptively, based on depth level associated with these pixels or regions as determined from the depth information for example, as described in more detail below with respect to FIG. 2A .
- FIG. 2A is a diagram illustrating an exemplary monoscopic camera, in accordance with an embodiment of the invention.
- the monoscopic camera 102 which may comprise a memory 202 , a processor 204 , a digital signal processor (DSP) 206 , an error protection module 208 , a video encoder/decoder 210 , an audio encoder/decoder 212 , a speaker 214 , a microphone 216 , an optics module 218 , an emitter 220 , an input/output (I/O) module 228 , a digital display 230 , controls 232 , and optical viewfinder 234 .
- DSP digital signal processor
- the camera 102 may also comprise a plurality of sensors which may be operable to capture and/or generate video information corresponding to images and/or video streams.
- the camera 102 may comprise, for example, one or more image sensors 222 , one or more color sensor 224 , and one or more depth sensor 226 .
- the camera 102 may also comprise the lens 101 c , which may be operable to collect and sufficiently focus electromagnetic waves in the visible and infrared spectra to enable capturing images and/or video.
- the memory 202 may suitable logic, circuitry, interfaces, and/or code that may enable temporary and/or permanent storage of data, and/or retrieval or fetching thereof.
- the memory 202 may comprise, for example, DRAM, SRAM, flash memory, a hard drive or other magnetic storage, or any other suitable memory devices.
- SRAM may be utilized to store data utilized and/or generated by the processor 204 and a hard-drive and/or flash memory may be utilized to store recorded image data and depth data.
- the processor 204 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to coordinate operation of the various components of the camera 102 .
- the processor 204 may, for example, run an operating system of the camera 102 and control communication of information and signals between components of the camera 102 .
- the processor 204 may execute instructions stored in the memory 202 .
- the DSP 206 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to perform complex processing of captured image data, captured depth data, and captured audio data.
- the DSP 206 may be operable to, for example, compress and/or decompress the data, encode and/or decode the data, and/or filter the data to remove noise and/or otherwise improve perceived audio and/or video quality for a listener and/or viewer.
- the error protection module 208 may comprise suitable logic, circuitry, interfaces and/or code that may be operable to perform error protection functions for the monoscopic camera 102 .
- the error protection module 208 may provide error protection to encoded 2D video images and corresponding depth information, and/or encoded audio data for transmission to a video rendering device that may be communicatively coupled to the monoscopic camera 102 .
- the video encoder/decoder 210 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to process captured color, brightness, and/or depth data to make the data suitable for conveyance to, for example, the display 230 and/or to one or more external devices via the I/O block 228 .
- the video encoder/decoder 210 may convert between, for example, raw RGB or YCrCb pixel values and an MPEG encoding.
- the video encoder/decoder 210 may be implemented in the DSP 206 .
- the audio encoder/decoder 212 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to process captured color, brightness, and/or depth data to make the data suitable for conveyance to, for example, the speaker 214 and/or to one or more external devices via the I/O block 228 .
- the video encoder/decoder 210 may convert between, for example, raw pulse-code-modulated audio and an MP3 or AAC encoding.
- the audio encoder/decoder 212 may be implemented in the DSP 206 .
- the speaker 214 may comprise suitable logic, circuitry, interfaces, and/or code operable to convert electrical signals into acoustic waves.
- the microphone 216 may be operable to amplify, equalize, and/or otherwise generate audio signals based on audio information generated in the camera 102 .
- the directionality of the speaker 214 may be controlled electronically and/or mechanically.
- the microphone 216 may comprise a transducer and associated logic, circuitry, interfaces, and/or code operable to convert acoustic waves into electrical signals.
- the microphone 216 may be operable to amplify, equalize, and/or otherwise process captured audio signals.
- the directionality of the microphone 216 may be controlled electronically and/or mechanically.
- the optics module 218 may comprise various optical devices for conditioning and directing EM waves received via the lens 101 c .
- the optics module 218 may direct EM waves in the visible spectrum to the image sensor 222 and direct EM waves in the infrared spectrum to the depth sensor 226 .
- the optics module 218 may comprise, for example, one or more lenses, prisms, color filters, and/or mirrors.
- Each image sensor 222 may each comprise suitable logic, circuitry, interfaces, and/or code that may be operable to convert optical signals to electrical signals.
- Each image sensor 222 may comprise, for example, a charge coupled device (CCD) images sensor or a complimentary metal oxide semiconductor (CMOS) image sensor.
- CMOS complimentary metal oxide semiconductor
- Each image sensor 222 may capture 2D brightness and/or color information.
- Each color sensor 224 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to detect color generation and/or generate color related information based thereon in images captures via the camera 102 .
- Each depth sensor 226 may comprise suitable logic, circuitry, interfaces, and/or code that may be operable to detect EM waves in the infrared spectrum and determine distance to objects based on reflected infrared waves. In an embodiment of the invention, distance may be determined based on time-of-flight of infrared waves transmitted by the emitter 220 and reflected back to the color sensor 224 . In an embodiment of the invention, depth may be determined based on distortion of a captured grid.
- the input/output module 228 may comprise suitable logic, circuitry, interfaces, and/or code that may enable the camera 102 to interface with other devices in accordance with one or more standards such as USB, PCI-X, IEEE 1394, HDMI, DisplayPort, and/or analog audio and/or analog video standards.
- the I/O module 228 may be operable to send and receive signals from the controls 232 , output video to the display 230 , output audio to the speaker 214 , handle audio input from the microphone 216 , read from and write to cassettes, flash cards, hard disk drives, solid state drives, or other external memory attached to the camera 102 , and/or output audio and/or video via one or more ports such as a IEEE 1394 or USB port.
- the digital display 230 may comprise suitable logic, circuitry, interfaces, and/or code that may enable displaying video and/or images, captured, generated, and/or processed via the monoscopic camera 102 .
- the digital display 230 may comprise, for example, an LCD, LED, OLED, or other digital display technology on which images recorded via the camera 102 may be displayed.
- the digital display 230 may be operable to display 3D images.
- the controls 232 may comprise suitable logic, circuitry, interfaces, and/or code. The controls 232 may enable a user to interact with the camera 102 . For example, controls for controlling recording and playback.
- the controls 232 may enable a user to select whether the camera 102 records and/or outputs video in 2D or 3D modes.
- the optical viewfinder 234 may enable a user to see what the lens 101 c “sees,” that is, what is “in frame.”
- the camera 102 may comprise an image sensor pipeline (ISP) 250 .
- the ISP 250 may be implemented as a dedicated component, and/or as part of another component of the camera 102 , such as the processor 202 for example.
- the ISP 250 may comprise suitable circuitry, logic, interfaces and/or code that may be operable to process imaging (or video) data, which may be received from one or more imaging related sensors, such as image sensors 222 , sensor 224 , and/or depth sensor 226 .
- the ISP 250 may perform and/or support various video processing operations and/or techniques comprising, for example, filtering, demosaic, lens shading correction, defective pixel correction, white balance, image compensation, Bayer interpolation, color transformation, and/or post filtering.
- the ISP 250 may provide accelerated processing of imaging data.
- the accelerated processing may be achieved by use of pipelined based architecture, with the ISP 250 comprising programmable pipeline structure for example.
- the ISP 250 may comprise, for example, multiple sensor processing stages, implemented in hardware, software, firmware, and/or any combination thereof. Exemplary processing stages may comprise demosaicing, geometric distortion correction, color conversion, denoising, and/or sharpening, for example. Furthermore, processing of image data may be performed on variable sized tiles, reducing the memory requirements of the ISP 250 processes. Data may be moved from any point of the ISP 250 and processed in software and the resulting software processed data may be put into any desired point of the ISP 250 for processing in hardware.
- the camera 102 may be utilized to generate 3D video and/or images based on captured 2D video data and corresponding depth information.
- the depth sensor(s) 226 may capture depth information and the image sensor(s) 222 may capture 2D image information.
- the image sensor(s) 222 may capture only brightness information for rendering black and white 3D video.
- the depth information may, for example, be stored and/or communicated as metadata and/or an additional layer of information associated with 2D image information.
- a data structure in which the 2D image information is stored may comprise one or more fields and/or indications that indicate depth data associated with the stored 2D image information is available for rendering a 3D image.
- packets in which the 2D image information is communicated may comprise one or more fields and/or indications that indicate depth data associated with the communicated 2D image information is available for rendering a 3D image.
- the camera 101 may read the 2D image information out of memory, and process it to generate a 2D video stream to the display and/or the I/O block.
- For outputting 3D video may: (1) read the 2D image information from memory; (2) determine, based on an indication stored in memory with the 2D image information, that associated depth information is available; (3) read the depth information from memory; and (4) process the 2D image information and depth information to generate a 3D video stream.
- Processing of the 2D image information and depth information may comprise synchronizing the depth information to the 2D image information. Processing of the 2D image information and depth information may comprise scaling and/or interpolating either or both of the 2D image information and the associated depth information.
- the resolution of the depth sensor 226 may be less than the resolution of the image sensor 222 . Accordingly, the camera 102 may be operable to interpolate between pixels of depth information to generate depth information for each pixel, or group of pixels, of 2D image information.
- the frame rate of the depth sensor 226 may be less than the frame rate of the image sensor 222 . Accordingly, the camera 102 may be operable to interpolate between frames of depth information to generate a frame of depth information for each frame of 2D image information.
- the monoscopic camera 102 may be operable to utilize depth information for color enhancement, by configuring and/or adjusting color-related video processing operations to enhance coloring related information in captured and/or generated 2D video or images.
- depth information captured via the depth sensor 226 may be utilized to determine and/or estimate presence of different depth levels in 2D images or video, which may be captured via the image sensor 222 .
- the color processing may then be performed and/or configured selectively, wherein color processing for of color information, generated via color sensor 224 for example, for specific pixels or regions in the images may be performed adaptively based on depth level associated with these pixels or regions, as determined from the depth information.
- depth information may be utilized, for example, in determining and/or estimating real color corresponding to particular (target) objects in captured images, and/or to enable performing color correction and/or enhancement, to improve 3D perception of generated and/or generated images and/or video.
- color correction and/or enhancement may comprise setting and/or adjusting color related information based on determined or estimated three-dimensional spatial characteristics, such as positioning of surfaces of the target objects relative to the camera for example, and/or based on color related effects attributed to surrounding regions and/or other adjacent objects.
- color correction and/or enhancement may be performed based on in accordance with, for example, shading, shadow, and/or edge effects.
- shading based color correction and/or enhancement may comprise adaptively and/or variably setting or adjusting color information associated with different surfaces of the target objects to depict varying shade levels in a manner that further enhance 3D perception of the target objects, wherein certain surfaces may appear to have darker or lighter shade compared to remaining portions of the target objects.
- shading related color enhancement may comprise adjusting color information such that surfaces facing the camera may have lighter shades whereas surfaces facing sideway (i.e. close to 90° angles relative to the camera) may have darker shades.
- Color correction and/or enhancement may also comprise adaptively setting and/or adjusting color information associated with at least portion of the target objects to reflect and/or to account for shadowing effects.
- color information associated with a target object's, or part thereof may change when the target object is present in shadow of other object(s)—e.g. person in shadow of a tree—and accordingly color correction and/or enhancement may enable adjusting color information based on degree of shadow effects.
- shadowing effects may be determined based on, for example, determination of separation of the objects.
- object separation may be determined and/or estimated three-dimensionally, based on depth information for example, which may enable determining and/or estimating relative position of both the target object and the object(s) causing the shadowing effects, by determining position and depth of each object relative to the monoscopic camera 102 .
- Color correction and/or enhancement may also comprise setting and/or adjusting color information associated with edges of target object, to enhance contrasting effects associated with these edges for example.
- edges may comprise both “absolute” edges—i.e., edges associated with boundaries of objects, and edges resulting from overlapping of objects at different depth—i.e. objects closer to the monoscopic camera 102 may partially block parts of other objects further away from the monoscopic camera 102 . Accordingly, determining and/or estimating object edges within captured scenes may be performed based on depth information for example.
- color correction and/or enhancement may comprise generating, based on depth information for example, pixel data comprising color related information associated with “dead pixels.”
- dead pixels may comprise pixels in captured images or video for which there is no video data, which may result from errors encountered during capturing of images and/or during processing of the video information associated with the captured images.
- the pixel data may be generated based on surrounding regions and/or objects, which may be selected based on depth information, to ensure that these regions and/or objects are close to and/or at the same depth as the target object comprising the dead pixels.
- information corresponding to captured images, as generated by the image sensor 222 may be scanned to find any such dead (or bad) pixels, and this information may be correlated with corresponding color information, as generated by the color sensor 224 and with corresponding depth information, as generated by the depth sensor 226 , to enable performing the necessary color related correction.
- FIG. 2B is a block diagram illustrating an exemplary image sensor pipeline (ISP), which may be utilized in accordance with an embodiment of the invention. Referring to FIG. 2B , there is shown the image sensor pipeline (ISP) 250 of FIG. 2A .
- ISP image sensor pipeline
- the ISP 250 may comprise suitable circuitry, logic, interfaces and/or code that may be operable to perform various functions associated with processing of imaging data, which may be received from one or more imaging related sensors, in accelerated manner, by use of pipelined based architecture for example.
- the ISP 250 may be utilized to enable, for example, pipelined color processing of captured images.
- the ISP 250 may be configured as a programmable pipeline structure, comprising a plurality of functions 250 A - 250 N , each of which associated with handling and/or performing particular image processing function.
- the ISP 250 may enable accelerated image processing by splitting the processing of data associated with each particular image into stages, to enable concurrently handling multiple images with each of the plurality of functions 250 A - 250 N being utilized to, for example, perform the corresponding processing function on different images.
- ISP 250 may enable handling multiple images since processing of each image may be at different stage at any given point. This may enable implementing various aspects of the invention by adjusting different stages of pipelined functions, without affecting the overall processing duration since some of the operations may be done while other stages are being performed.
- Exemplary processing functions handled and/or implemented by the ISP 250 may comprise, for example, auto-focus function 250 A , flash-metering function 250 B , auto-white-balance (AWB) function 250 C , image segmentation function 250 D , and/or image scaling function 250 N .
- auto-focus function 250 A flash-metering function 250 B
- ABB auto-white-balance
- the auto-focus function 250 A may comprise performing focusing operations automatically.
- focusing may comprise selecting one or more portions of an image to be focal points during images processing, in which light from these portions and/or objects therein, are optimally captured and/or corresponding image information are consequently very accurate.
- Auto-focus operations may comprise use and/or control of image sensors to enable selecting focus points, and/or to determine correct focusing associated therewith.
- auto-focus may be active, in which distance to the focus points (or objects) may be determined, and subsequently correct focusing may be effectuated, by controlling and/or adjusting available image sensors, using such techniques as light metering for example.
- Auto-focus may also be passive, in which focus point selection and/or corresponding focusing adjustment may be performed base don passive analysis of the image, and/or associate image information after the image is captured.
- the flash-metering function 250 B may comprise controlling flashing operations, such as of the camera 102 , based on image sensory information.
- flash-metering may comprise determining and/or measuring levels of light or brightness in a scene with which an image is associated, and selecting and/or controlling based thereon the amount of light emitted by a flash component coupled to and/or integrated into the camera.
- the light measuring may be performed using one or more sensors, and/or via the camera's lenses.
- the AWB function 250 C may comprise performing white balance operations automatically.
- white balancing may comprise adjusting color intensities of portions of an image associated with the white color, to ensure that these portions may be render correctly—that is, with more natural feel, based on identification of the objects associated with these white areas and/or settings in which the image was captured.
- the white color may typically be function of equal, or near equal mixing of the three primary colors (red, green, and blue). Accordingly, during color balancing, contribution or parameters associated with each of these three colors may be adjusted to adjust the whiteness of the white color region.
- white balancing may comprise adjusting image portions associated with snow such that the white color associated with the snow may be rendered with a degree of blueness.
- the image segmentation function 250 D may comprise partitioning an image, whose information is processed, into multiple segments, each of comprising a plurality of contagious and/or non-contagious pixels, based on presence of one or more common characteristics among pixels in each segment.
- the common characteristics may be determined based on predetermined ranges associated with one or more video information, such as intensity and/or color.
- Image segmentation may be utilized to enable simplifying and/or changing processing image data, by configuring analysis and/or processing of image data in accordance with the common characteristics associated with each segment.
- Image segmentation may also be utilized to enable and/or enhance locating objects and boundaries, such as lines or curves, in images.
- the image scaling function 250 N may comprise resizing images, and/or portions thereof, to increase or decrease the image (or portion) size.
- image scaling may comprise and/or pertain to zooming operations, in which a portion of an image may be adjusted to fit larger or smaller portion of screen.
- Image scaling may affect various characteristics of the mages, such as smoothness and/or sharpness. In this regard, increasing the size of image may reduce the smoothness and/or sharpness in the image, while decreasing the size of image may enhance its smoothness and/or sharpness.
- Image scaling may comprise subsampling or upsampling an image, or portion thereof based on whether the image (or portion) is being scaled up or down.
- the depth information which may be generated and/or captured via the depth sensor 226 for example, may be utilized to enhance and/or improve image processing performed in the camera 102 .
- the depth information may be utilized to generate and/or adjust control information utilized in controlling and/or managing operations of the ISP 250 .
- the control information may be utilized to adjust and/or control various stages and/or functions of the ISP 250 , such as the auto-focus function 250 A , the flash-metering function 250 B , the AWB function 250 C , the image segmentation function 250 D , and/or the image scaling function 250 N .
- the auto-focus function 250 A may be adjusted, based on depth information, to enable selecting focus points, and/or configuring focusing operations relating thereto, adaptively at different depths relative to the camera 102 .
- algorithms utilized during AWB operations may be adjusted to enable applying white balancing adaptively at different depths relative to the camera 102 .
- algorithms and/or parameters utilized scaling operations may be adjusted to enable performing scaling operations adaptively at different depths relative to the camera 102 .
- FIG. 3 illustrates processing of depth information and 2D image information to generate a 3D image, which may be utilized in accordance with an embodiment of the invention.
- a frame 330 of depth information which may be captured by the depth sensor(s) 226
- a frame 334 of 2D image information captured by the image sensors 222 .
- the depth information 330 and the 2D image information 334 may be processed to generate a frame 336 associated with a corresponding 3D image.
- plane 332 indicated by a dashed line, which is merely for illustration purposes to indicate depth on the two dimensional drawing sheets.
- the line weight is utilized to indicate depth—heavier lines being closer to the viewer.
- the object 338 is farthest from the camera 102
- the object 342 is closest to the camera 102
- the object 104 is at an intermediate distance.
- depth information such as in frame 330 for example, may be utilized to provide depth related adjustments to corresponding 2D video information, such as in frame 334 for example.
- the depth information may be mapped to a grayscale, or pseudo-grayscale, image for display to the viewer. Such mapping may be performed by the DSP 206 for example.
- the image associated with the frame 334 may be a conventional 2D image.
- a viewer of the frame 234 for example on the display 120 or on a dedicated display device connected to the camera 102 via the I/O module 228 , may perceive the same distance to each of the objects 338 , 340 , and 342 . That is, each of the objects 338 , 340 , and 342 each appear to reside on the plane 332 .
- 2D video information and corresponding depth information may be processed to enable generating 3D images, associated with frame 336 for example, which may provide depth perception when viewed.
- the depth information of frame 330 may be utilized to adaptively adjust video information with each of objects in the 2D images of frames 334 to create perception of different depths for objects contained therein.
- the viewer of frames 336 on the display 120 or on a dedicated display device connected to the camera 102 via the I/O module 228 for example, may perceive the object 338 being furthest from the viewer the object 342 being closest to the viewer, and the object 340 being at an intermediate distance.
- the object 338 may appear to be behind the reference plane
- the object 340 may appear to be on the reference plane
- the object 342 may appear to be in front of the reference plane.
- depth information may be utilized in configuring and/or controlling color processing when generating 3D images, such as instances of frame 336 for example.
- depth information corresponding to frame 330 may be utilized to determine and/or estimate presence of different objects 338 , 340 , and 342 at different depth levels.
- processing of color information in 2D image information frame 334 associated with object 338 , 340 , and 342 may be configured such that color information associated with each object may be set and/or adjusted separately and/or adaptively, to enable modifying color information associated with each of the objects 338 , 340 , and 342 in frame 336 to enhance color-related 3D perception when frame 336 is viewed, substantially as described with regard to FIG. 2A for example.
- the color related adjustments may incorporate, for example, shading, shadowing, and/or edge related adjustments.
- FIG. 4 is a diagram that illustrates exemplary selective processing of objects via monoscopic camera based on Z-depth information to enable adaptive color enhancement, which may be utilized in accordance with an embodiment of the invention.
- an image frame 400 which may be captured and/or processed via the monoscopic camera 102 for example.
- the image frame 400 may comprise video information corresponding to a plurality of objects, such as objects 402 a , 402 b , and 402 c .
- objects 402 a , 402 b , and 402 c may be located at difference depths relative to a reference point, which may correspond to, for example, location of the monoscopic camera 102 at the time when the image frame 400 is generated.
- the monoscopic camera 102 may utilize depth information captured and/or generated at the time the image frame 400 is generated for enhancing color processing of various elements therein, such as the objects 402 a , 402 b , and 402 c .
- the monoscopic camera 102 may be operable to determine different depth level at which each of the objects 402 a , 402 b , and 402 c is located, as shown in FIG. 4 .
- the monoscopic camera 102 may be operable to determine based on depth information, for each of the objects 402 a , 402 b , and 402 c , surrounding region within the corresponding depth level, as represented by shaded areas 404 a , 404 b , and 404 c , respectively.
- color processing may be controlled and/or managed, based on depth information for information, to enable enhancing color information associated with each of the objects 402 a , 402 b , and 402 c .
- depth information for information For example, once depth level associated with each object is determined, a specific surrounding region, such as one of regions 404 a , 404 b , or 404 c may be utilized in adjusting and/or setting color information associated with each of the objects 402 a , 402 b , and 402 c .
- the color processing enhancement and/or correction may comprise setting and/or adjusting color information associated with edges between each of the objects 402 a , 402 b , and 402 c and each of the regions 404 a , 404 b , or 404 c , respectively, substantially as described with regard to FIG. 2A for example.
- FIG. 5 is a flow chart that illustrates exemplary steps for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information, in accordance with an embodiment of the invention.
- ISP image sensor pipeline
- FIG. 5 there is shown a flow chart 500 comprising a plurality of exemplary steps that may be performed to enable performing utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information during video processing.
- 2D video data may be captured via image sensor(s) of a monoscopic camera.
- depth information may be captured, via depth sensor(s) of the monoscopic camera for example.
- the captured depth information may correspond to the captured 2D video.
- one or more objects may be detected in scene(s) in the captured video, based on captured depth information for example.
- one or more adjust objects and/or regions may be determined for each detected object.
- processing of color information associated with each detected object may be configured and/or modified, based on depth information and/or based on adjacent objects and/or regions, substantially as described with regard to FIG. 2A for example.
- configuring color related processing may incorporate adaptive and/or selective color adjustment and/or corrections, to incorporate shadowing, shading, and/or edge related modifications for example.
- at least some of the adaptive and/or selective color adjustment and/or corrections may be performed by modifying and/or adjusting settings of various stages and/or functions in the ISP 250 .
- Various embodiments of the invention may comprise a method and system for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information.
- the monoscopic video camera 102 may be utilized to detect, via one or more image sensors 222 , color sensors 224 , and/or depth sensors 226 for example, presence of objects at varying depths, and may adaptively configure color related processing of video information associated with each of these objects based on corresponding depth for each for these objects.
- Color related processing may comprise setting and/or adjusting color relate parameters and/or overall color hue associated with the objects.
- controlling color processing may comprise adjusting and/or controlling one or more functions 250 A - 250 N in the ISP 250 .
- the monoscopic video camera 102 may capture, via image sensors 222 and/or color sensors 224 , two-dimensional video, and may capture, via depth sensor 226 , corresponding depth information for the captured two-dimensional video. The monoscopic video camera 102 may then determine presence of objects in the captured two-dimensional video, based on the captured corresponding depth information for example. Once object presence is determined, color related processing of image related information corresponding to the objects may be configured based on corresponding depth information of the object. In this regard, configuring color related processing may comprise setting and/or adjusting color information associated with the object. Setting and/or adjusting color information may be based on, for example, shadow, shade, and/or edge related information associated with the object.
- At least some of the shadow, shade, and/or edge related information associated with the object may be generated and/or modified based on the captured corresponding depth information based on the captured corresponding depth information.
- Configuration of color related processing of image related information associated with objects may be performed based on preset criteria and/or parameters associated with identified types and/or characteristics of the objects.
- the monoscopic video camera 102 may be operable to synchronize the captured corresponding depth information to the captured two-dimensional video, to enable generating 3D perception for at least some images captured via the monoscopic video camera 102 .
- inventions may provide a non-transitory computer readable medium and/or storage medium, and/or a non-transitory machine readable medium and/or storage medium, having stored thereon, a machine code and/or a computer program having at least one code section executable by a machine and/or a computer, thereby causing the machine and/or computer to perform the steps as described herein for utilizing image sensor pipeline (ISP) for enhancing color of the 3D image utilizing z-depth information.
- ISP image sensor pipeline
- the present invention may be realized in hardware, software, or a combination of hardware and software.
- the present invention may be realized in a centralized fashion in at least one computer system, or in a distributed fashion where different elements are spread across several interconnected computer systems. Any kind of computer system or other apparatus adapted for carrying out the methods described herein is suited.
- a typical combination of hardware and software may be a general-purpose computer system with a computer program that, when being loaded and executed, controls the computer system such that it carries out the methods described herein.
- the present invention may also be embedded in a computer program product, which comprises all the features enabling the implementation of the methods described herein, and which when loaded in a computer system is able to carry out these methods.
- Computer program in the present context means any expression, in any language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) conversion to another language, code or notation; b) reproduction in a different material form.
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Abstract
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US13/077,922 US20120050494A1 (en) | 2010-08-27 | 2011-03-31 | Method and system for creating a view-angle dependent 2d and/or 3d image/video utilizing a monoscopic video camera array |
US13/077,880 US20120050477A1 (en) | 2010-08-27 | 2011-03-31 | Method and System for Utilizing Depth Information for Providing Security Monitoring |
US13/077,893 US20120050478A1 (en) | 2010-08-27 | 2011-03-31 | Method and System for Utilizing Multiple 3D Source Views for Generating 3D Image |
US13/077,868 US8810565B2 (en) | 2010-08-27 | 2011-03-31 | Method and system for utilizing depth information as an enhancement layer |
US13/077,900 US20120050480A1 (en) | 2010-08-27 | 2011-03-31 | Method and system for generating three-dimensional video utilizing a monoscopic camera |
US13/077,912 US8994792B2 (en) | 2010-08-27 | 2011-03-31 | Method and system for creating a 3D video from a monoscopic 2D video and corresponding depth information |
US13/077,926 US8730302B2 (en) | 2010-08-27 | 2011-03-31 | Method and system for enhancing 3D effects for 3D video rendering |
US13/077,923 US20120050490A1 (en) | 2010-08-27 | 2011-03-31 | Method and system for depth-information based auto-focusing for a monoscopic video camera |
US13/077,899 US8947506B2 (en) | 2010-08-27 | 2011-03-31 | Method and system for utilizing depth information for generating 3D maps |
US13/077,930 US20120050495A1 (en) | 2010-08-27 | 2011-03-31 | Method and system for multi-view 3d video rendering |
US13/077,886 US20120054575A1 (en) | 2010-08-27 | 2011-03-31 | Method and system for error protection of 3d video |
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US20120050484A1 (en) | 2012-03-01 |
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US20120050483A1 (en) | 2012-03-01 |
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